Alf.io

Alf.io provides a self‑hostable web application for managing the entire lifecycle of an event, from ticket distribution and sales to on‑site check‑in and reporting. Organizers can run the system on their own infrastructure, using PostgreSQL as the backend, and access a back‑office where they create events, configure pricing, and monitor attendance. The platform includes a mobile app for iOS and Android to support check‑in operators and sponsors, and a Raspberry Pi‑based touch‑screen station that can operate offline while preventing duplicate check‑ins.

The software integrates with several payment providers—including Stripe, Mollie, Revolut, PayPal, and bank transfers—allowing attendees to purchase tickets online. Extensions enable connection to external tools such as CRM systems, and the system supports multiple languages and a responsive Bootstrap‑based interface that works on desktop and mobile devices.

Alf.io is released under the GPL‑3.0 license, requires Java 17 to run, and is positioned for event organizers who prioritize privacy, security, and transparent pricing without subscription fees. Its architecture includes HTTPS, strict content‑security policies, and PCI‑compliant payment handling.